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EE Chapter 22 Physical Pharmacy and Drug stability Q&A (1 OF 102) Sample Questions

1. Correct statements regarding vapor pressure may include:
I. Vapor pressure is not a colligative propriety.
II. Increasing solute decreases the vapor pressure.
III. Increasing solute increases the boiling point.

A. I only
B. III only
C. I and II only
D. II and III only
E. All are correct

Answer

Ans: D

Tips: Vapor pressure is a colligative property.

Strategic thinking:
1. Read the question. This is a K-type of question that asks you the right combination choices.
2. Look for the cues and keywords. Your cue here is correct statements. Keywords are vapour pressure. In principle, you know as you have learned that vapour pressure is a colligative property. This then excludes I from the combination which eliminates options bearing this. From here, it will be easier for you to deliberate on the conditions stated from the choices keeping in mind that colligative properties are dependent on the concentration of the solute.
3. Therefore, the correct answer is D.

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